十红滩铀矿床北矿带砂岩中黏土矿物特征及其与铀矿化关系  

Characteristics of Clay Minerals in the Northern ore-belt Sandstone of Shihongtan Uranium Deposit and Its Relation with Uranium Mineralization

作　　者：伍群 荆国强 杨冰彬 曹雷 Wu Qun;Jing Guoqiang;Yang Bingbin;Cao Lei(Research institute of No203,CNNC,Xi an 710000,Shan xi,China)

机构地区：[1]核工业二〇三研究所,西安710000

出　　处：《中国煤炭地质》2021年第4期55-61,共7页Coal Geology of China

基　　金：中国核工业地质局铀矿地质勘查项目(202116-2)。

摘　　要：十红滩铀矿床是我国典型的层间氧化带砂岩型铀矿床之一,含矿岩系为中侏罗统西山窑组。为了研究其成矿作用、沉积环境及成矿规律,通过显微镜下鉴定、扫描电镜、X射线衍射等分析测试手段,对研究区内目的层西山窑组砂岩黏土矿物的镜下特征、含量、成分、形态进行了系统的研究。结果表明:含矿层黏土矿物主要类型为高岭石、伊利石,其次为绿泥石,少量伊/蒙混层,而不同种类的黏土矿物之间存在着一系列的相互转化关系。通过分析结果,总结了该矿带不同地化分带中其含量、形态特征,并探讨了不同种类黏土矿物的吸附能力及其与铀成矿的关系。Shihongtan uranium deposit is one of the typical interlayer oxidation zone sandstone type uranium deposits in China,the ore-bearing rock series is the Xishanyao formation of middle Jurassic.In order to study its mineralization,sedimentary environment and metallogenic regularity,By means of identification under microscope,scanning electron microscope and X-ray diffraction,the microscopic characteristics,content,composition and morphology of sandstone clay minerals of Xishanyao Formation in the study area were systematically studied.The results show that the main types of clay minerals are kaolinite and illite,followed by chlorite and a small amount of illite/montmorillonite mixed layer in ore bearing beds There are a series of mutual transformation relationships among different types of clay minerals.Based on the analysis of the results,it’s summarized the content and morphological characteristics of different geochemical zoning in the ore belt,and discussed the adsorption capacity of different kinds of clay minerals and their relationship with uranium mineralization.

关 键 词：十红滩铀矿床 黏土矿物 后生蚀变 铀矿化 

分 类 号：P591[天文地球—地球化学]